Find the least common denominator of the rational expressions.
and 
A. x( x - 9)
B. x( x + 9)( x - 9)
C. ( x2 + 9)( x2 - 9)
D. x( x + 9)( x - 9)2
Answer: B
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Simplify the radical.
A. x5
B. x10
C. x10
D. x5
Solve the problem.Suppose a charitable organization decides to raise money by raffling a trip worth $500. If 3,000 tickets are sold at $1.00 each, find the expected value of winning for a person who buys 1 ticket.
A. -$0.85 B. -$1.00 C. -$0.81 D. -$0.83
Express the transform of the given expression in terms of s and ?
.2y" - y' + y, f 
= 0, f' 
= 1
A. 
?
- 2s
B. 
?
- 2
C. 
?
- 2s + 1
D. 
?
+ 2
Solve the problem.Vicki's car rental company charges $20 per day plus $0.25 per mile to rent a car. Joshua's rental company charges $23 per day plus $0.20 per mile. The total daily cost, y, in dollars, of renting the car if x miles are driven can be modeled by the linear system: y = 0.25x + 20 Vicki's y = 0.20x + 23 Joshua's Use graphing to solve the system. Interpret the coordinates of the solution in practical terms. 
A. {(60, 35)}; Both companies charge $60 for 35 miles driven. B. {(40, 30)}; Both companies charge $30 for 40 miles driven. C. {(60, 35)}; Both companies charge $35 for 60 miles driven. D. {(60, 40)}; Both companies charge $40 for 60 miles driven.